AT89C51ID2-RLTUM Atmel, AT89C51ID2-RLTUM Datasheet - Page 20

• Manufacturer Part Number: AT89C51ID2-RLTUM
• Description: IC 8051 MCU FLASH 64K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51ID2-RLTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: UART, SPI, TWI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Package: 44VQFP
• Device Core: 8051
• Family Name: 89C
• Maximum Speed: 40 MHz
• Height: 1.45 mm
• Length: 10.1 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 10.1 mm
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

Timer 0: Clock Inputs
4289C–8051–11/05
Note:
SCLKT0 = 0: Timer 0 uses the standard T0 pin as clock input (Standard mode)
SCLKT0 = 1: Timer 0 uses the special Sub Clock as clock input, this feature can be use
as periodic interrupt for time clock.
Figure 1. Timer 0: Clock Inputs
(AT 8xC51Ix2 only)
–
FCLK PERIPH
F
In X2 Mode:
In X1 Mode:
The SCLKT0 bit in OSCCON register allows to select Timer 0 Subsidiary clock.
Sub Clock
CLK CPU
T0 pin
INT0
TR0
Gate
and F
OSCCON
SCLKT0
CLK PERIPH
F
F
1
0
:6
CPU
CPU
=
=
F
F
CLKPERIPH
CLKPERIPH
, for CKRL≠0xFF
TMOD
C/T
1
0
=
=
--------------------------------------------- -
2
--------------------------------------------- -
4
×
×
Control
(
(
255 CKRL
255 CKRL
F
F
OSCA
OSCA
–
–
Timer 0
)
)
AT89C51ID2
20